On Saturday 30 July 2022 at 09:40 UTC, a CLDAP reflection targeted a education platform customer in Iberia. The attack peaked at 88.5 Gbps and lasted 8 minutes. Traffic originated from 1117 autonomous systems in 31 countries, predominantly residential proxy networks.
| Vector | CLDAP reflection |
| Peak | 88.5 Gbps |
| Duration | 8 min |
| Time to mitigation | 0.047 s |
| Attack traffic reaching origin | 0.024% |
| Legitimate traffic challenged | 0.42% |
Timeline
The attack was preceded by a hacktivist channel announcing the target. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 34 points of presence.
What the customer saw
No customer-visible impact. The on-call engineer was notified and acknowledged the incident from the dashboard.
Recommendations
- Enable authenticated origin pulls.
- Keep origin IPs out of public DNS history.
- Review allow-listed partner ranges quarterly.